package com.wz.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //登录成功之后，应该有用户Session
        Object loginUser=request.getSession().getAttribute("loginUser");
        if(loginUser==null){
            //没登录
            request.setAttribute("msg","没有权限，不可登录");
            request.getRequestDispatcher("/login.html").forward(request,response);
            return false;
            //不放行
        }else{
            return true;
        }
           /* 前端拦截的时候使用

        return true;*/
        }
}
